US20100210838A1 - Fluoropyrrolidines having dipeptidyl peptidase enzyme inhibitory activity - Google Patents
Fluoropyrrolidines having dipeptidyl peptidase enzyme inhibitory activity Download PDFInfo
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- US20100210838A1 US20100210838A1 US12/697,762 US69776210A US2010210838A1 US 20100210838 A1 US20100210838 A1 US 20100210838A1 US 69776210 A US69776210 A US 69776210A US 2010210838 A1 US2010210838 A1 US 2010210838A1
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- 230000002401 inhibitory effect Effects 0.000 title description 4
- 102000003779 Dipeptidyl-peptidases and tripeptidyl-peptidases Human genes 0.000 title 1
- 108090000194 Dipeptidyl-peptidases and tripeptidyl-peptidases Proteins 0.000 title 1
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 28
- 108010067722 Dipeptidyl Peptidase 4 Proteins 0.000 claims abstract 4
- 150000001875 compounds Chemical class 0.000 claims description 68
- -1 pirazolyl Chemical group 0.000 claims description 49
- 229910052731 fluorine Inorganic materials 0.000 claims description 31
- 150000003839 salts Chemical class 0.000 claims description 24
- 125000005843 halogen group Chemical group 0.000 claims description 22
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 22
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 21
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 20
- 125000004076 pyridyl group Chemical group 0.000 claims description 20
- 125000003118 aryl group Chemical group 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 17
- 239000012453 solvate Substances 0.000 claims description 14
- 125000000229 (C1-C4)alkoxy group Chemical group 0.000 claims description 11
- 125000002252 acyl group Chemical group 0.000 claims description 11
- 125000004214 1-pyrrolidinyl group Chemical group [H]C1([H])N(*)C([H])([H])C([H])([H])C1([H])[H] 0.000 claims description 10
- 125000004195 4-methylpiperazin-1-yl group Chemical group [H]C([H])([H])N1C([H])([H])C([H])([H])N(*)C([H])([H])C1([H])[H] 0.000 claims description 10
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 125000005530 alkylenedioxy group Chemical group 0.000 claims description 10
- 125000003785 benzimidazolyl group Chemical group N1=C(NC2=C1C=CC=C2)* 0.000 claims description 10
- 125000004604 benzisothiazolyl group Chemical group S1N=C(C2=C1C=CC=C2)* 0.000 claims description 10
- 125000004603 benzisoxazolyl group Chemical group O1N=C(C2=C1C=CC=C2)* 0.000 claims description 10
- 125000001164 benzothiazolyl group Chemical group S1C(=NC2=C1C=CC=C2)* 0.000 claims description 10
- 125000004541 benzoxazolyl group Chemical group O1C(=NC2=C1C=CC=C2)* 0.000 claims description 10
- 125000000259 cinnolinyl group Chemical group N1=NC(=CC2=CC=CC=C12)* 0.000 claims description 10
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 10
- 125000002541 furyl group Chemical group 0.000 claims description 10
- 150000004677 hydrates Chemical class 0.000 claims description 10
- 125000002883 imidazolyl group Chemical group 0.000 claims description 10
- 125000003453 indazolyl group Chemical group N1N=C(C2=C1C=CC=C2)* 0.000 claims description 10
- 125000002183 isoquinolinyl group Chemical group C1(=NC=CC2=CC=CC=C12)* 0.000 claims description 10
- 125000001786 isothiazolyl group Chemical group 0.000 claims description 10
- 125000000842 isoxazolyl group Chemical group 0.000 claims description 10
- 125000002816 methylsulfanyl group Chemical group [H]C([H])([H])S[*] 0.000 claims description 10
- 125000001715 oxadiazolyl group Chemical group 0.000 claims description 10
- 125000002971 oxazolyl group Chemical group 0.000 claims description 10
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 claims description 10
- 125000004592 phthalazinyl group Chemical group C1(=NN=CC2=CC=CC=C12)* 0.000 claims description 10
- 125000000587 piperidin-1-yl group Chemical group [H]C1([H])N(*)C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 claims description 10
- 125000003373 pyrazinyl group Chemical group 0.000 claims description 10
- 125000002098 pyridazinyl group Chemical group 0.000 claims description 10
- 125000000714 pyrimidinyl group Chemical group 0.000 claims description 10
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 claims description 10
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 claims description 10
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 claims description 10
- 125000000335 thiazolyl group Chemical group 0.000 claims description 10
- 125000001544 thienyl group Chemical group 0.000 claims description 10
- 239000011737 fluorine Substances 0.000 claims description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical group [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 125000004307 pyrazin-2-yl group Chemical group [H]C1=C([H])N=C(*)C([H])=N1 0.000 claims description 7
- 239000011541 reaction mixture Substances 0.000 claims description 6
- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 6
- 239000008194 pharmaceutical composition Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 claims description 3
- 125000000246 pyrimidin-2-yl group Chemical group [H]C1=NC(*)=NC([H])=C1[H] 0.000 claims description 3
- 125000003277 amino group Chemical group 0.000 claims description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 2
- 206010012601 diabetes mellitus Diseases 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 125000003831 tetrazolyl group Chemical group 0.000 claims description 2
- 125000004306 triazinyl group Chemical group 0.000 claims description 2
- 230000006806 disease prevention Effects 0.000 claims 1
- 102100025012 Dipeptidyl peptidase 4 Human genes 0.000 abstract description 8
- 239000002532 enzyme inhibitor Substances 0.000 abstract 1
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- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 41
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- WUOQXNWMYLFAHT-QMMMGPOBSA-N tert-butyl n-[(3s)-piperidin-3-yl]carbamate Chemical compound CC(C)(C)OC(=O)N[C@H]1CCCNC1 WUOQXNWMYLFAHT-QMMMGPOBSA-N 0.000 description 1
- DQQJBEAXSOOCPG-ZETCQYMHSA-N tert-butyl n-[(3s)-pyrrolidin-3-yl]carbamate Chemical compound CC(C)(C)OC(=O)N[C@H]1CCNC1 DQQJBEAXSOOCPG-ZETCQYMHSA-N 0.000 description 1
- CKXZPVPIDOJLLM-UHFFFAOYSA-N tert-butyl n-piperidin-4-ylcarbamate Chemical compound CC(C)(C)OC(=O)NC1CCNCC1 CKXZPVPIDOJLLM-UHFFFAOYSA-N 0.000 description 1
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Images
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- C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
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- C07D451/14—Heterocyclic compounds containing 8-azabicyclo [3.2.1] octane, 9-azabicyclo [3.3.1] nonane, or 3-oxa-9-azatricyclo [3.3.1.0<2,4>] nonane ring systems, e.g. tropane or granatane alkaloids, scopolamine; Cyclic acetals thereof containing 9-azabicyclo [3.3.1] nonane ring systems, e.g. granatane, 2-aza-adamantane; Cyclic acetals thereof
Definitions
- the present invention relates to the novel compound of the general formula (I) possessing dipeptidyl-peptidase-IV enzyme inhibitory activity, as well as their salts, solvates and isomers, to the therapeutic application of the compounds of the general formula (I), to the pharmaceutical compositions containing the compounds of the general formula (I), to the process for their preparation and to the new intermediates of the general formulae (II), (III), (V), (VII), (VIII) and (IX).
- the enzyme dipeptidyl-peptidase-IV (DPP-IV), which is identical with the lymphocyte surface glycoprotein CD26, a polypeptide with the molar mass of 110 k Dalton, is formed in the tissues and organs of mammals. This enzyme can be found, among others, in the liver, in the Langerhans islets, in the renal cortex, in the lungs, and in certain tissues of the prostate and small intestine. Significant DPP-IV activity can be observed furthermore in the body fluids (as for instance in the plasma, serum and urine).
- DPP-IV is a serine protease type enzyme, which has the unique specificity to cleave dipeptides from the N-terminals of peptides where the penultimate amino acid is primarily proline, alanine or hydroxy proline.
- DPP-IV enzyme is responsible for the decomposition of the glucagon-like peptides, peptide-1 (GLP-1) and peptide-2 (GLP-2) in the body.
- the enzyme GLP-1 strongly stimulates the insulin production of the pancreas, thus it has a direct, favourable effect on the glucose homeostasis, therefore DPP-IV inhibitors are suitable for the treatment and prevention of non-insulin dependent diabetes mellitus (NIDDM) and other diseases related with the DPP-IV enzyme activity including but not limited to diabetes, obesity, hyperlipidemia, dermatological or mucous membrane disorders, poriasis, intestinal distress, constipation, autoimmune disorders such as enchephalomyelitis, complement mediated disorders such as glomerulonepritis, lipodystrophy, and tissue damage, psychosomatic, depressive, and neurophsychiatric disease such as anxiety, depression, insomnia, schizophrenia, epilepsy, spasm, and chronic pain, HIV infection, allergies, inflammation, arthritis, transplant rejection,
- R 1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups
- R 1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups
- R 1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group, B stands for
- R 1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups
- R 1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group, B stands for
- R 1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups
- R 1a means C 1 -4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group, B stands for
- R 1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently mono- or disubstituted by one or two of the following groups: C 1 -4 alkyl groups, C 1 -4 alkoxy
- R 1a means C 1 -4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group, B stands for
- R 1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently mono- or disubstituted by one or two of the following groups: C 1 -4 alkyl groups, C 1 -4 alkoxy
- R 1a means C 1 -4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group, B stands for
- R1, B or R2 and R3 are those groups which are listed in Tables 1 to 3 including any combinations thereof, for example (2S)-4,4-difluoro-1-(2- ⁇ [8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl]exo-amino ⁇ acetyl)-2-pyrrolidine carbonitrile; (2S,4S)-4-fluoro-1-(2- ⁇ [8-(2-pyrazinyl)-8-azabicyclo-[3.2.1]-oct-3-yl]exo-amino ⁇ acetyl)-2-pyrrolidinecarbonitrile; (2S)-4,4-Difluoro-1-(2- ⁇ [1-(2-pyrazinyl)piperidin-4-yl]amino ⁇ acetyl)-2-pyrrolidine carbonitrile; (2S)-4,4-Difluoro-1-(2- ⁇ [1-(5-cyano
- Term “nitrogen containing aromatic moiety consisting of one or two aromatic rings” includes all such ring systems known at the priority date of our present patent application.
- halogen atom means fluorine, chlorine, bromine, or iodine atom.
- C 1 -4 alkyl group and “C 1 -4 alkoxy group” mean linear or branched chain aliphatic hydrocarbon groups containing 1-4 carbon atoms.
- the compounds of the general formula (I) according to our invention can be prepared by the alkylation of the primary amines of the general formula (II)—wherein the meanings of R 1 and B are the same as given above—with the chloroacetyl derivative of the general formula (III)—wherein the meanings of R 2 and R 3 are as given above—and, if desired, by transforming the resulting compounds into one of their salts or solvates (Scheme 1).
- the chloroacetyl derivatives of the general formula (III) are applied in excess, and the resulting hydrogen chloride is bound by various acid binding agents, preferably by a base, such as for instance triethylamine, potassium carbonate, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 2-terc-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2-diazaphosphorine- bound to a resin (PBEMP)-, which is known as super base.
- a base such as for instance triethylamine, potassium carbonate, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 2-terc-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2-diazaphosphorine- bound to a resin (PBEMP)-, which is known as super base.
- DBU 1,8-diazabicy
- the primary amines of the general formula (II) are prepared in a two-step synthesis (Scheme 2).
- the starting cyclic secondary amine of the general formula (IV)—wherein the meaning of Y is hydrogen atom, acetyl, or tert-butoxycarbonyl group- are arylated, preferably with the aryl halogenides of the general formula (X), wherein the meaning of R 1 is the same as given above and X stands for halogen atom.
- the arylation reaction can be carried out in polar, protic or aprotic solvents, between 25 and 150° C., preferably in alcohols (ethanol, n-butanol, n-pentanol), or without solvent in microwave oven, using an acid binder, for instance the excess of the amine, or DBU.
- polar, protic or aprotic solvents between 25 and 150° C., preferably in alcohols (ethanol, n-butanol, n-pentanol), or without solvent in microwave oven, using an acid binder, for instance the excess of the amine, or DBU.
- the protecting group Y is removed from the arylated amine of the general formula (V)—wherein the meanings of R 1 and B are the same as defined above- by acidic hydrolysis.
- the reaction is carried out in aqueous hydrochloric acid or in ethanolic hydrogen chloride solution at a temperature between 25 and 78° C. to yield the aliphatic or cyclic primary amines of the general formula (II)—wherein the meanings of R 1 and B are the same as defined above.
- R 1 stands for an acyl group of formula R 1a —CO
- the protecting group Y is cleaved under acidic conditions, preferably by use of trifluoroacetic acid in dichloromethane solution, at 0-30° C., to obtain the amines of the general formula (II), wherein the meaning of R 1 is the group of formula R 1a —CO.
- the starting compounds are the fluoroproline derivatives, preferably L-fluoroproline derivatives—wherein the meanings of R 2 and R 3 are the same as defined above- with a nitrogen protected with tert-butoxycarbonyl group.
- These compounds can be prepared by methods written in the literature (Tetrahedron Lett. 1998, 39, 1169).
- a mixed anhydride is prepared with pivaloyl chloride or chloroformic acid ethyl ester, then the carbamoyl derivatives of the general formula (VII)—wherein the meanings of R 2 and R 3 are the same as defined above- are formed.
- the reaction is preferably carried out in a halogenated solvent (CHCl 3 , CH 2 Cl 2 ), at 0-25° C.
- a halogenated solvent CHCl 3 , CH 2 Cl 2
- the tert-butoxycarbonyl group is cleaved in ethanolic hydrogen chloride solution.
- the hydrolysis takes place at 0-25° C. and the hydrochlorides of the carboxamides of the general formula (VIII)—wherein the meanings of R 2 and R 3 are the same as defined above- are obtained.
- the fluoropyrrolidinecarboxamides of the general formula (VIII) thus obtained are in the third step acylated with chloroacetyl chloride, preferably at 0° C., in a halogenated solvent (CHCl 3 , CH 2 Cl 2 ).
- a halogenated solvent CHCl 3 , CH 2 Cl 2 .
- the chloroacetylcarbamoyl derivatives of the general formula (IX) are dehydrated to yield the chloroacetylcyano derivatives of the general formula (III)—wherein the meanings of R 2 and R 3 are the same as defined above.
- Dehydration is preferably carried out with phosphorous oxychloride in dichloromethane at the boiling point of the reaction mixture.
- DPP-IV enzyme inhibitory activities of the compounds with the general formula (I) were determined by the following method:
- Standard curve of AMC is linear up to 31.25 ⁇ M concentration, that is why we used the relative fluorescence unit (RFU) of the AMC formed. It is detected by using 360 nm excitation and 465 emission filters (30 ⁇ s integration time, Gain 25, No. of Flashes 50) by Tecan Spectrofluor Plus plate reader. Under these conditions enzyme reaction is linear for at least 30 min, and the enzyme dependence is linear up to 2.5 ⁇ g protein (up to 700 RFU).
- the assay is designed to detect the active inhibitors as efficiently as possible, using a 60 min preincubation time at 37° C.
- the fluorescence (RFU) of AMC formed is detected using 360 nm excitation and 465 emission filters in Tecan spectrofluor Plus plate reader (30 ⁇ s integration time, Gain 25 No. of Flashes 50). Inhibition % are calculated using the RFU of control and RFU of blank.
- IC 50 values characteristic for the enzyme inhibitory effect of the compounds of the general formula (I) according to the invention are smaller than 100 nM.
- the compounds of the general formula (I) and their salts solvates and isomers can be formulated to orally or parenterally applicable pharmaceutical compositions by methods known per se, by mixing them with one or more pharmaceutically accepted excipients and can be administered as a unitary dosage form.
- the appropriate unitary dosage form comprise the oral forms, such as tablets, hard or soft gelatin capsules, powders, granules and oral solutions or suspensions, the sublingual, buccal, intratracheal, intraocular, intranasal forms, by inhalation, the topical, transdermal, sub-cutaneous, intramuscular or intra-venous forms, the rectal forms and the implants.
- the compounds of the invention may be used as creams, gels, ointments of lotions.
- a unitary dosage form for a compound according to the invention in the form of a tablet, can comprise the following ingredients:
- a compound of the general formula (I) 50.0 mg Mannitol 223.75 mg Croscarmellose sodium 6.0 mg Maize starch 15.0 mg Hydroxypropyl methylcellulose 2.25 mg Magnesium stearate 3.0 mg
- Daily dose of the compounds of the general formula (I) may depend on several factors, thus the nature and seriousness of the disease of the patient, the mode of application and on the compound itself.
- FIG. 1 shows compounds of the general formula (I),
- FIG. 2 shows compounds of the general formula (II),
- FIG. 3 shows compounds of the general formula (III),
- FIG. 4 shows compounds of the general formula (IV),
- FIG. 5 shows compounds of the general formula (V),
- FIG. 6 shows compounds of the general formula (VI),
- FIG. 7 shows compounds of the general formula (VII),
- FIG. 8 shows compounds of the general formula (VIII),
- FIG. 9 shows compounds of the general formula (IX),
- FIG. 10 shows compounds of the general formula (X),
- FIG. 11 shows formula (1)
- FIG. 12 shows formula (2)
- FIG. 13 shows formula (3)
- FIG. 14 shows formula (4)
- FIG. 15 shows formula (5)
- FIG. 16 shows formula (6)
- FIG. 17 shows formula (7).
- R 1 is 2-pyrimidinyl group
- B means a group of formula (4)
- R 2 and R 3 mean fluorine atom in general formula (I).
- R 1 means 2-pyrazinyl-group
- B means a group of formula (4)
- R 2 means hydrogen atom
- R 3 means fluorine atom.
- R 2 means hydrogen atom and R 3 means fluorine atom.
- R 2 means hydrogen atom and R 3 means fluorine atom.
- R 2 means hydrogen atom and R 3 means fluorine atom.
- R 1 means 2-pyrazinyl group
- B means a group of formula (4)
- R 2 stands for hydrogen atom
- R 3 stands for fluorine atom.
- R 1 is 2-pyrazinyl group
- B means a group of formula (I)
- R 2 and R 3 mean fluorine atom in general formula (I).
- R 1 is 5-cyano-pyridin-2-yl group
- B means a group of formula (I)
- R 2 and R 3 mean fluorine atom in general formula (I).
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Abstract
Description
- The present invention relates to the novel compound of the general formula (I) possessing dipeptidyl-peptidase-IV enzyme inhibitory activity, as well as their salts, solvates and isomers, to the therapeutic application of the compounds of the general formula (I), to the pharmaceutical compositions containing the compounds of the general formula (I), to the process for their preparation and to the new intermediates of the general formulae (II), (III), (V), (VII), (VIII) and (IX).
- The enzyme dipeptidyl-peptidase-IV (DPP-IV), which is identical with the lymphocyte surface glycoprotein CD26, a polypeptide with the molar mass of 110 k Dalton, is formed in the tissues and organs of mammals. This enzyme can be found, among others, in the liver, in the Langerhans islets, in the renal cortex, in the lungs, and in certain tissues of the prostate and small intestine. Significant DPP-IV activity can be observed furthermore in the body fluids (as for instance in the plasma, serum and urine).
- DPP-IV is a serine protease type enzyme, which has the unique specificity to cleave dipeptides from the N-terminals of peptides where the penultimate amino acid is primarily proline, alanine or hydroxy proline.
- DPP-IV enzyme is responsible for the decomposition of the glucagon-like peptides, peptide-1 (GLP-1) and peptide-2 (GLP-2) in the body. The enzyme GLP-1 strongly stimulates the insulin production of the pancreas, thus it has a direct, favourable effect on the glucose homeostasis, therefore DPP-IV inhibitors are suitable for the treatment and prevention of non-insulin dependent diabetes mellitus (NIDDM) and other diseases related with the DPP-IV enzyme activity including but not limited to diabetes, obesity, hyperlipidemia, dermatological or mucous membrane disorders, poriasis, intestinal distress, constipation, autoimmune disorders such as enchephalomyelitis, complement mediated disorders such as glomerulonepritis, lipodystrophy, and tissue damage, psychosomatic, depressive, and neurophsychiatric disease such as anxiety, depression, insomnia, schizophrenia, epilepsy, spasm, and chronic pain, HIV infection, allergies, inflammation, arthritis, transplant rejection, high blood pressure, congestive heart failure, tumors, and stress-induced abortions.
- Our aim was to prepare new, effective, stable and safe DPP-IV inhibitors.
- We have found that the compounds of the general formula (I) wherein R1 stands for:
-
- a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl, benzisoxazolyl, tetrazolyl or triazinyl rings; which are, optionally, mono- or disubstituted independently from each other by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups, halogen atom, trihalogenomethyl group, methylthio group, nitro group, cyano group, amino group or phenyl group; or
- thienyl or furyl or benzyl group; or
- p-toluenesulfonyl group; or
- the acyl group of formula R1a—CO, wherein R1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more C1-4 alkyl- and/or C1-4 alkoxy- or nitro-group or halogen atom; phenylethenyl group, or a phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methyl-piperazin-1-yl, or pyrrolidin-1-yl group;
B stands for a group according to the formula (1) or (2) or (3) or (4) or (5) or (6) or (7);
R2 stands for hydrogen atom or fluoro atom;
R3 stands for fluoro atom—
as well as the salts, isomers and solvates of these compounds have significant advantages as regards their activity, duration of action, stability and toxicity in comparison with the state of the art.
- In agreement with the accepted terminology, the configuration of carbon atom in position 2 of the fluoropyrrolidine group is favourably S, whereas that of carbon atom in position 4 is S or R.
- One embodiment of the present invention includes compounds of the general formula (I)—wherein R1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups, halogen atom, trihalogenomethyl group, methylthio group, nitro group, cyano group; or
-
- thienyl or furyl group; or
- p-toluenesulfonyl group; or
- acyl group of formula R1a—CO, wherein R1a means C1-4 alkyl group, phenyl group;
phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group,
B stands for - a group of formula (1) or (2) or (3) or (4) or (5) or (6) or (7);
R2 stands for hydrogen atom or fluorine atom;
R3 stands for fluorine atom—
and salts, isomers, tautomers solvates and hydrates thereof.
- Another embodiment of the present invention includes compounds of the general formula (I)—wherein R1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups, halogen atom, trihalogenomethyl group, methylthio group, nitro group, cyano group; or
- a thienyl or furyl group; or
a p-toluenesulfonyl group; or
an acyl group of formula R1a—CO, wherein R1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group,
B stands for -
- a group of formula (1);
R2 stands for hydrogen atom or fluorine atom;
R3 stands for fluorine atom—
and salts, isomers, tautomers solvates and hydrates thereof.
- a group of formula (1);
- Another embodiment of the present invention includes compounds of the general formula (I)—wherein R1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups, halogen atom, trihalogenomethyl group, methylthio group, nitro group, cyano group; or
- a thienyl or furyl group; or
a p-toluenesulfonyl group; or
an acyl group of formula R1a—CO, wherein R1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group,
B stands for -
- a group of formula (2);
R2 stands for hydrogen atom or fluorine atom;
R3 stands for fluorine atom—
and salts, isomers, tautomers solvates and hydrates thereof.
- a group of formula (2);
- Another embodiment of the present invention includes compounds of the general formula (I)—wherein R1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently from each other mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups, halogen atom, trihalogenomethyl group, methylthio group, nitro group, cyano group; or
- a thienyl or furyl group; or
a p-toluenesulfonyl group; or
an acyl group of formula R1a—CO, wherein R1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group,
B stands for -
- a group of formula (3);
R2 stands for hydrogen atom or fluorine atom;
R3 stands for fluorine atom—
and salts, isomers, tautomers solvates and hydrates thereof.
- a group of formula (3);
- Another embodiment of the present invention includes compounds of the general formula (I)—wherein R1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups, halogen atom, trihalogenomethyl group, methylthio group, nitro group, cyano group; or
- a thienyl or furyl group; or
a p-toluenesulfonyl group; or
an acyl group of formula R1a—CO, wherein R1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group,
B stands for -
- a group of formula (4) or (5);
R2 stands for hydrogen atom or fluorine atom;
R3 stands for fluorine atom—
and salts, isomers, tautomers solvates and hydrates thereof.
- a group of formula (4) or (5);
- Another embodiment of the present invention includes compounds of the general formula (I)—wherein R1 means a nitrogen-containing aromatic moiety consisting of one or two aromatic rings, preferably a pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, imidazolyl, pirazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, indazolyl, benzothiazolyl, benzisothiazolyl, benzoxazolyl or benzisoxazolyl ring; which is, in a given case, independently mono- or disubstituted by one or two of the following groups: C1-4 alkyl groups, C1-4 alkoxy groups, halogen atom, trihalogenomethyl group, methylthio group, nitro group, cyano group; or
- a thienyl or furyl group; or
a p-toluenesulfonyl group; or
an acyl group of formula R1a—CO, wherein R1a means C1-4 alkyl group, phenyl group; phenyl, pyridyl or phenylethenyl group substituted with one or more alkyl- and/or alkoxy- or nitro-group or halogen atom; phenylethenyl or phenylethyl group substituted with alkylene-dioxy group; piperidin-1-yl, 4-methylpiperazin-1-yl, pyrrolidin-1-yl group,
B stands for -
- a group of formula (6) or (7);
R2 stands for hydrogen atom or fluorine atom;
R3 stands for fluorine atom—
and salts, isomers, tautomers, solvates and hydrates thereof.
- a group of formula (6) or (7);
- Preferred compound of the general formula (I) are wherein R1, B or R2 and R3 are those groups which are listed in Tables 1 to 3 including any combinations thereof, for example (2S)-4,4-difluoro-1-(2-{[8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl]exo-amino}acetyl)-2-pyrrolidine carbonitrile; (2S,4S)-4-fluoro-1-(2-{[8-(2-pyrazinyl)-8-azabicyclo-[3.2.1]-oct-3-yl]exo-amino}acetyl)-2-pyrrolidinecarbonitrile; (2S)-4,4-Difluoro-1-(2-{[1-(2-pyrazinyl)piperidin-4-yl]amino}acetyl)-2-pyrrolidine carbonitrile; (2S)-4,4-Difluoro-1-(2-{[1-(5-cyanopyridin-2-yl)piperidin-4-yl]amino}acetyl)-2-pyrrolidine carbonitrile; (2S)-4,4-Difluoro-1-(2-{[1-(6-chloropyridazin-3-yl)piperidin-4-yl]amino}acetyl)-2-pyrrolidine carbonitrile; (25)-4,4-Difluoro-1-(2-{[1-(6-cyanopyridazin-3-yl)piperidin-4-yl]amino}acetyl)-2-pyrrolidine carbonitrile;
- Term “nitrogen containing aromatic moiety consisting of one or two aromatic rings” includes all such ring systems known at the priority date of our present patent application.
- Term “halogen atom” means fluorine, chlorine, bromine, or iodine atom. “C1-4 alkyl group” and “C1-4 alkoxy group” mean linear or branched chain aliphatic hydrocarbon groups containing 1-4 carbon atoms.
- The compounds of the general formula (I) according to our invention can be prepared by the alkylation of the primary amines of the general formula (II)—wherein the meanings of R1 and B are the same as given above—with the chloroacetyl derivative of the general formula (III)—wherein the meanings of R2 and R3 are as given above—and, if desired, by transforming the resulting compounds into one of their salts or solvates (Scheme 1).
- In the course of the alkylation the chloroacetyl derivatives of the general formula (III) are applied in excess, and the resulting hydrogen chloride is bound by various acid binding agents, preferably by a base, such as for instance triethylamine, potassium carbonate, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 2-terc-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2-diazaphosphorine- bound to a resin (PBEMP)-, which is known as super base. The reaction is preferably performed at a temperature between 25 and 70° C.
- The primary amines of the general formula (II) are prepared in a two-step synthesis (Scheme 2). In the first step the starting cyclic secondary amine of the general formula (IV)—wherein the meaning of Y is hydrogen atom, acetyl, or tert-butoxycarbonyl group- are arylated, preferably with the aryl halogenides of the general formula (X), wherein the meaning of R1 is the same as given above and X stands for halogen atom. Depending on the meaning of R1 the arylation reaction can be carried out in polar, protic or aprotic solvents, between 25 and 150° C., preferably in alcohols (ethanol, n-butanol, n-pentanol), or without solvent in microwave oven, using an acid binder, for instance the excess of the amine, or DBU.
- For starting material the free amines or protected secondary amines of the general formula (IV)—known from the literature- are used, thus 4-acetaminopiperidine (B=formula (I), Y═COCH3) (U.S. Pat. No. 3,225,037);
- 4-tert-butoxycarbonylaminopiperidine (B=formula (I), Y═COOC(CH3)3) (J. Med. Chem. 1999, 42, 2706); 3-(S)-tert-butoxycarbonylaminopiperidine (B=formula (2)) and 3-(S)-tert-butoxycarbonylaminopyrrolidine (B=formula (3)) (Synth. Comm. 1998, 28, 3919) in the last two cases Y═COOC(CH3)3; tert-butyl 8-azabicyclo[3.2.1]-oct-3-yl-exo-carbamate (B=formula (4), tert-butyl 8-azabicyclo[3.2.1]-oct-3-yl-endo-carbamate (B=formula (5)) (J. Med. Chem. 1991, 34, 656), tert-butyl 9-azabicyclo[3.3.1]-non-3-yl exo-carbamate (B=formula (6)) and tert-butyl 9-azabicyclo-[3.3.1]-non-3-yl-endo-carbamate (B=formula (7)), (J. Med. Chem. 1993, 36, 3720)) (Y═COOC(CH3)3).
- In the second step the protecting group Y is removed from the arylated amine of the general formula (V)—wherein the meanings of R1 and B are the same as defined above- by acidic hydrolysis. The reaction is carried out in aqueous hydrochloric acid or in ethanolic hydrogen chloride solution at a temperature between 25 and 78° C. to yield the aliphatic or cyclic primary amines of the general formula (II)—wherein the meanings of R1 and B are the same as defined above.
- If R1 stands for an acyl group of formula R1a—CO, the compounds of the general formula (IV)—wherein the meaning of Y is tert-butoxycarbonyl group—are reacted with the acid derivatives of the general formula R1a—COZ— wherein the meaning of Z is a leaving group, preferably a chloro atom- advantageously at a temperature around 0° C., by using an inorganic or organic base, preferably triethylamine as acid binding agent. From the compounds of the general formula (V) the protecting group Y is cleaved under acidic conditions, preferably by use of trifluoroacetic acid in dichloromethane solution, at 0-30° C., to obtain the amines of the general formula (II), wherein the meaning of R1 is the group of formula R1a—CO.
- The 1-(2-chloroacetyl)-2-pyrrolidinecarbonitriles of the general formula (III)—wherein the meanings of R2 and R3 are the same as defined above- are prepared in a four-step synthesis (Scheme 3).
- The starting compounds are the fluoroproline derivatives, preferably L-fluoroproline derivatives—wherein the meanings of R2 and R3 are the same as defined above- with a nitrogen protected with tert-butoxycarbonyl group. These compounds can be prepared by methods written in the literature (Tetrahedron Lett. 1998, 39, 1169). In the first step a mixed anhydride is prepared with pivaloyl chloride or chloroformic acid ethyl ester, then the carbamoyl derivatives of the general formula (VII)—wherein the meanings of R2 and R3 are the same as defined above- are formed.
- The reaction is preferably carried out in a halogenated solvent (CHCl3, CH2Cl2), at 0-25° C.
- In the second step the tert-butoxycarbonyl group is cleaved in ethanolic hydrogen chloride solution. The hydrolysis takes place at 0-25° C. and the hydrochlorides of the carboxamides of the general formula (VIII)—wherein the meanings of R2 and R3 are the same as defined above- are obtained.
- The fluoropyrrolidinecarboxamides of the general formula (VIII) thus obtained are in the third step acylated with chloroacetyl chloride, preferably at 0° C., in a halogenated solvent (CHCl3, CH2Cl2). Thus the chloroacetylcarbamoyl derivatives of the general formula (IX)—wherein the meanings of R2 and R3 are the same as defined above- are formed.
- In the fourth step the chloroacetylcarbamoyl derivatives of the general formula (IX) are dehydrated to yield the chloroacetylcyano derivatives of the general formula (III)—wherein the meanings of R2 and R3 are the same as defined above. Dehydration is preferably carried out with phosphorous oxychloride in dichloromethane at the boiling point of the reaction mixture.
- DPP-IV enzyme inhibitory activities of the compounds with the general formula (I) were determined by the following method:
-
- DPP-IV. source: solubilized crude extractum from CaCo/Tc-7 cells content: 0.8-1 μg/assay
- Substrate: H-Gly-Pro-AMC (Bachem)
- Reaction: 1 hour preincubation with samples at 37° C., 30 min reaction time at 37 C.°
- Stop solution: 1M Na-acetate buffer (pH=4.2)
- Reaction mixture: 10 μl enzyme solution
- 10 μl test compound or assay buffer
- 55 μl assay buffer
- 25 μl substrate
- 300 μl stop solution
- Measurement: spectrofluorometric determination by Tecan plate reader
- (Ex: 360 Nm Em: 465 Nm)
- The reaction of the DPP-IV enzyme and the H-Gly-Pro-AMC substrate is recorded by the liberation of AMC (7-amino-4-methylcoumarin) at 37° C. in 100 mM Tris-HCl, pH=7.5 (assay buffer). Standard curve of AMC is linear up to 31.25 μM concentration, that is why we used the relative fluorescence unit (RFU) of the AMC formed. It is detected by using 360 nm excitation and 465 emission filters (30 μs integration time, Gain 25, No. of Flashes 50) by Tecan Spectrofluor Plus plate reader. Under these conditions enzyme reaction is linear for at least 30 min, and the enzyme dependence is linear up to 2.5 μg protein (up to 700 RFU). Using 1-0.8 μg of extracted protein Km for H-Gly-Pro-AMC is 50 μM. Substrate concentrations higher than 500 μM caused fluorescency detection problems (inner filter effect) that can be solved by dilution of the samples.
- The assay is designed to detect the active inhibitors as efficiently as possible, using a 60 min preincubation time at 37° C. The assay is conducted by adding 0.8-1 μg protein extract in 10 μl enzyme solution (using assay buffer: 100 mM Tris-HCl, pH=7.5) to the wells containing the test compounds in 10 μl volume and the 55 μl assay buffer (65 μl assay buffer in the case of controls). After the preincubation period, the reaction is started by the addition of 25 μl 1 mM H-Gly-Pro-AMC substrate solution (250 μM final concentration). The final test volume is 100 μl and the test solution contains 1% DMSO coming from the test compounds solution. Reaction time is 30 min at 37° C., and the reaction is stopped by adding 300 μl 1M Na-acetate buffer, pH=4.2. The fluorescence (RFU) of AMC formed is detected using 360 nm excitation and 465 emission filters in Tecan spectrofluor Plus plate reader (30 μs integration time, Gain 25 No. of Flashes 50). Inhibition % are calculated using the RFU of control and RFU of blank.
- IC50 values characteristic for the enzyme inhibitory effect of the compounds of the general formula (I) according to the invention are smaller than 100 nM.
- The compounds of the general formula (I) and their salts solvates and isomers can be formulated to orally or parenterally applicable pharmaceutical compositions by methods known per se, by mixing them with one or more pharmaceutically accepted excipients and can be administered as a unitary dosage form.
- The appropriate unitary dosage form comprise the oral forms, such as tablets, hard or soft gelatin capsules, powders, granules and oral solutions or suspensions, the sublingual, buccal, intratracheal, intraocular, intranasal forms, by inhalation, the topical, transdermal, sub-cutaneous, intramuscular or intra-venous forms, the rectal forms and the implants. For the topical application, the compounds of the invention may be used as creams, gels, ointments of lotions.
- As example, a unitary dosage form for a compound according to the invention, in the form of a tablet, can comprise the following ingredients:
-
A compound of the general formula (I) 50.0 mg Mannitol 223.75 mg Croscarmellose sodium 6.0 mg Maize starch 15.0 mg Hydroxypropyl methylcellulose 2.25 mg Magnesium stearate 3.0 mg - Daily dose of the compounds of the general formula (I) may depend on several factors, thus the nature and seriousness of the disease of the patient, the mode of application and on the compound itself.
- Further details of the invention are demonstrated by the examples below, without limiting the claims to the examples.
-
FIG. 1 shows compounds of the general formula (I), -
FIG. 2 shows compounds of the general formula (II), -
FIG. 3 shows compounds of the general formula (III), -
FIG. 4 shows compounds of the general formula (IV), -
FIG. 5 shows compounds of the general formula (V), -
FIG. 6 shows compounds of the general formula (VI), -
FIG. 7 shows compounds of the general formula (VII), -
FIG. 8 shows compounds of the general formula (VIII), -
FIG. 9 shows compounds of the general formula (IX), -
FIG. 10 shows compounds of the general formula (X), -
FIG. 11 shows formula (1), -
FIG. 12 shows formula (2), -
FIG. 13 shows formula (3), -
FIG. 14 shows formula (4), -
FIG. 15 shows formula (5), -
FIG. 16 shows formula (6), -
FIG. 17 shows formula (7). - The meaning of R1 is 2-pyrimidinyl group, B means a group of formula (4), R2 and R3 mean fluorine atom in general formula (I).
- a.) tert-butyl 8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-carbamate with (V) general formula—where R1 is 2-pyrimidinyl, Y is COOC(CH3)3, B is (4) group
- 14.7 g of tert-butyl 8-azabicyclo[3.2.1]oct-3-yl-exo-carbamate (65 mmol) (J. Med. Chem. 1991, 34, 656) and 8.93 g of 2-chloropyrimidine (78 mmol) and 12.7 ml of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) (85 mmol) are dissolved in 230 ml of 1-pentanol and heated under reflux for 4 hours. The solvents are evaporated and the residue is dissolved in 250 ml of chloroform and washed with 2×300 ml of water, dried over Na2SO4, and purified by column chromatography using n-hexane-ethyl acetate-chloroform (1:1:1) as eluent to result in white crystals which are triturated with n-hexane. Yield: 13.25 g (67%). M.p.: 113-115° C. 1H-NMR (400 MHz, CDCl3): δ 1.34 (s, 9H), 1.49 (t, 2H), 1.66-1.97 (m, 6H), 3.89 (br, 1H), 4.61 (d, 2H), 6.60 (t+br, 1+1H), 8.34 (d, 2H).
- b.) 8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-amine with (II) general formula—where R1 and B are given in step 1a.)
- 13 g of tert-butyl 8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-carbamate (43 mmol) are dissolved in a mixture of 120 ml of trifluoroacetic acid and 120 ml of dichloromethane. The solution is stirred for 30 minutes and evaporated. The residue is dissolved in 50 ml of dichloromethane and evaporated. This method is repeated three times and the last organic solution is extracted with 100 ml of saturated aq. sodium carbonate solution. The layers are separated and the aqueous phase is washed with 4×50 ml of dichloromethane. The combined organic layers are dried over Na2SO4 and evaporated to result in a white powder which is triturated with n-hexane. Yield: 6.7 g (77%). M.p.: 56-59° C. 1H-NMR (400 MHz, DMSO-d6): δ 1.29 (t, 2H), 1.64-1.98 (m, 6H), 3.19 (m, 1H), 4.58 (dd, 2H), 6.57 (t, 1H), 8.33 (d, 2H).
- c.) tert-butyl) (2S)-2-(aminocarbonyl)-4,4-difluoro-1-pyrrolidinecarboxylate of the general formula (VII) wherein R2 and R3 mean fluorine atom
- 5.7 g (22.7 mmol) of tert-butyl (2S)-2-(aminocarbonyl)-4,4-difluoro-2-pyrrolidinecarboxylic acid (Tetraheron Lett. 1998, 39, 1169) are dissolved in 57 ml of dichloromethane and to the solution 3.8 ml (27.2 mmol) of triethylamine are added. To the resulting mixture dropwise, at −15° C. 3 ml (25 mmol) of pivaloyl chloride are added and the mixture is stirred at that temperature for 1 hour, then 7 ml of 25% aqueous ammonia solution are added drop wise and the mixture is stirred for 1 hour. The reaction mixture is washed with water, 1 N NaOH solution, then with water, dried over sodium sulphate and evaporated. On addition of diethyl ether 3.94 g (69%) of the above product crystallize. M.p.: 136-138° C. 1H-NMR (400 MHz, CDCl3): δ 1.48 (s, 9H); 2.3-2.9 (m, 3-CH2), 3.69 (br, minor)+3.86 (m, major)(5-CH2), 4.53 (br, 2-CH). 6.0 (br, major)+6.81 (br, minor)(NH2).
- d.) (2S)-4,4-difluoro-2-pyrrolidinecarboxamide hydrochloride of the general formula (VIII) wherein R2 and R3 mean fluorine atoms
- 3.93 g (15.7 mmol) of tert-butyl (25)-2-(aminocarbonyl)-4,4-difluoro-1-pyrrolidinecarboxylate are dissolved in 75 ml of 25% ethanolic hydrogen chloride solution and stirred at room temperature for 4 hours. To the resulting suspension 150 ml of diethyl ether are added, the resulting white crystalline material is filtered off. 2.55 g (87%) of the above product are obtained.
- M.p.: 232-233° C. 1H-NMR (400 MHz, DMSO-d6): δ 2.43-2.51 (m, minor) and 2.81-3.05 (m, major)(3-CH2), 3.71 (t, 2H, 5-CH2), 4.46 (t, 1H, 2-CH), 7.81 (s, 1H,)+8.12 (s, 1H)(NH2), 10.12 (br, 2H, NH2).
- e.) (2S)-1-(2-chloroacetyl)-4,4-difluoro-2-pyrrolidine-carboxamide of the general formula (IX) wherein R2 and R3 mean fluorine atoms
- 2.54 g (13.6 mmol) of (2S)-4,4-difluoro-2-pyrrolidinecarboxamide hydrochloride are suspended in 25 ml of dichloromethane and to the suspension 4.1 ml (29.3 mmol) of triethylamine are added. To the resulting mixture drop wise, below −10° C. 1.2 ml (15 mmol) of chloroacetyl chloride in 20 ml of dichloromethane are added. After 1 hour of stirring the suspension is poured into 450 ml of ethyl acetate, the precipitated triethylamine hydrochloride is filtered off, the filtrate is evaporated and purified by chromatography using chloroform-methanol 4:1 mixture eluent. 3.0 g (97%) of the above product are obtained in the form of colourless oil.
- 1H-NMR (400 MHz, DMSO-d6): δ 2.34-2.52 (m, 1H)+2.66-2.83 (m, 1H)(3-CH2), 4.07-4.29 (m, 2H, 5-CH2), 4.40 (qv, 2H, CH2Cl), 4.71 (m, 1H, 2-CH), 7.17 (br, 1H,)+7.42 (d, 1H)(NH2).
- f.) (2S)-1-(2-chloroacetyl)-4,4-difluoro-2-pyrrolidinecarbonitrile of the general formula (III) wherein R2 and R3 mean fluorine atoms
- 10.4 g (46 mmol) of (2S)-1-(2-chloroacetyl)-4,4-difluoro-2-pyrrolidine-carboxamide are dissolved in 230 ml of dichloromethane and 13 ml (140 mmol) of phosphorous oxychloride are added thereto. The mixture is heated for 24 hours (if there is remaining starting material then it is refluxed further). During the refluxing the solution will become pale yellow and sticky solid material is precipitated. The solution is poured into another pot and 50 g of potassium carbonate are added thereto. After stirring for an hour the solid salts are filtered out and the solution is evaporated. Pale yellow oil is received which is triturated with n-hexane. The received yellow crystals are collected and 70 ml of diethyl-ether are added. Thus impurities are dissolved and pure white solid crystalline product is obtained. Yield: 6.0 g (56%). M.p.: 86-87° C.
- 1H-NMR (400 MHz, CDCl3): δ 2.76-2.98 (m, 2H, 3-CH2), 3.92-4.26 (m, 2H, 5-CH2), 4.46 (qv, 2H, CH2Cl), 5.11 (m, 1H, 2-CH).
- g.) (2S)-4,4-difluoro-1-(2-{[8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl]exo-amino}acetyl)-2-pyrrolidinecarbonitrile
- 6.13 g of 8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-amine (30 mmol) and 5.74 g of (2S)-1-(2-chloroacetyl)-4,4-difluoro-2-pyrrolidinecarbo-nitrile (27.5 mmol) and 12.5 ml of triethylamine (90 mmol) are dissolved in 250 ml of dry acetonitrile and stirred at 70° C. for 3 hours and then at room temperature overnight. Then the mixture was evaporated to give a brownish thick oil which is purified by column chromatography using chloroform-methanol (6:1) as the eluent to result in a solid product which is crystallized from abs. ethanol. Yield: 5.7 g (77%). M.p.: 162-163° C.
- 1H-NMR (400 MHz, DMSO-d6): δ 1.32 (td, 2H), 1.6-2.0 (m, 7H), 2.6-2.9 (m, 2H), 2.85 (tt, 1H), 3.0-3.5 (m, 2H), 3.97 (ddd, 1H), 4.13 (ddd, 1H), 4.61 (m, 2H), 5.05 (dd, 1H), 6.60 (t, 1H), 8.35 (m, 2H).
- In the general formula (I) R1 means 2-pyrazinyl-group, B means a group of formula (4), R2 means hydrogen atom and R3 means fluorine atom.
- a.) tert-butyl 8-(2-pyrazinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-carbamate with (V) general formula—where R1 is 2-pyrazinyl, Y is COOC(CH3)3, B is (4) group
- 0.54 ml of chloropyrazine (6 mmol) and 1.13 g of tert-butyl 8-azabicyclo[3.2.1]oct-3-yl-exo-carbamate (6 mmol) 0.97 ml of 1,8-diazabicyclo [5.4.0]undec-7-ene (DBU) (6.5 mmol) are dissolved in 40 ml of 1-pentanol and heated under reflux for 50 hours. The solvents are evaporated, the residue is dissolved in 50 ml of chloroform, washed with 4×30 ml of water, dried over Na2SO4, and purified by column chromatography using n-hexane-ethyl acetate-chloroform (3:1:1) as eluent to result in white crystals which are triturated with n-hexane. Yield: 0.55 g (36%). M.p.: 122-123° C.
- 1H-NMR (200 MHz, DMSO-d6): δ 1.34 (s, 9H); 1.44-1.66 (m; 2H), 1.67-1.99 (m, 6H), 3.88 (m, 1H), 4.56 (bs, 2H), 6.59 (d, 1H), 7.77 (d, 1H), 8.07 (dd, 1H), 8.17 (d, 1H).
- b.) 8-(2-pyrazinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-amine with (II) general formula—where R1 and B are given in step 2a.)
- 3.85 mg of tert-butyl 8-(2-pyrimidinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-carbamate (1.26 mmol) are dissolved in 20 ml of 12% ethanolic hydrochloric acid and the solution is stirred for 7 hours. 20 ml water is added to the formed suspension and the pH is made to 11 with aqueous potassium hydroxide. The layers are separated, the organic phase are dried, evaporated and purified by column chromatography using ethyl acetate—methanol—25% aqueous NH3 solution (17:3:1) as eluent to result in a pale yellow oil. Yield is 167 mg (65%). 1H-NMR (200 MHz, DMSO-d6): δ 1.29 (t, 2H), 1.62-1.83 (m, 4H), 1.84-2.00 (m, 2H), 3.12 (sp, 1H), 4.57 (dd, 2H), 7.74 (d, 1H), 8.05 (dd, 1H), 8.15 (d, 1H).
- c.) tert-butyl (2S,4S)-2-(aminocarbonyl)-4-fluoro-1-pyrrolidinecarboxylate of the feneral formula (VII) wherein R2 means hydrogen atom and R3 means fluorine atom
- 1.63 g (7 mmol) of (2S,4S)-1-(tert-butoxycarbonyl)-4-fluoro-2-pyrrolidinecarboxylic acid (Tetraheron Lett. 1998, 39, 1169) are dissolved in 25 ml of dichloromethane and 1.2 ml (8.4 mmol) of triethylamine are added. 0.86 ml (7 mmol) of pivaloyl chloride are added dropwise to the mixture at −15° C. and it is stirred for 1 hour and 2 ml 25% of aqueous ammonium-hydroxide solution are added thereto. After one hour of stirring the reaction mixture is washed with water, 1N sodium hydroxide solution and with water again, it is dried on sodium sulfate and evaporated. 0.88 g (54%) of the title compound is crystallized from diethylether. Melting point is 173-175° C.
- 1H-NMR (400 MHz, DMSO-d6): δ 1.38 (s, 9H); 2.07-2.25 (m, 2H, 3-CH2), 3.49-3.67 (m, 2H, 5-CH2), 4.13 (d, 1H, 2-CH), 5.07 and 5.35 (br, 1H, 4-H), 6.91+7.17 (br, 2H, NH2).
- d.) (2S,4S)-4-fluoro-2-pyrrolidinecarboxamide hydrochloride
- In the general formula (VIII) R2 means hydrogen atom and R3 means fluorine atom.
- 4 g (17.2 mmol) of tent-butyl (2S,4S)-2-(aminocarbonyl)-4-fluoro-1-pyrrolidinecarboxylate are dissolved in 75 ml of 25% ethanolic hydrogen chloride solution and it is stirred for 4 hours at room temperature. The obtained white crystalline substance is filtered off, washed with ether and dried. Thus 2.56 g (88%) of above product are obtained. M.p.: 250-251° C.
- 1H-NMR (400 MHz, DMSO-d6): δ 2.31 (t, 1H), 2.49-2.65 (m, 1H), 3.46 (m, 1H), 4.30 (dd, 1H), 5.37 (d, 1H), 7.71 (s, 1H,) and 8.09 (s, 1H)(NH2), 9.7 (br, 2H, NH2 +).
- e.) (2S,4S)-1-(2-chloroacetyl)-4-fluoro-2-pyrrolidinecarboxamide
- In the general formula (IX) R2 means hydrogen atom and R3 means fluorine atom.
- 2.54 g (15 mmol) of (2S,4S)-4-fluoro-2-pyrrolidinecarboxamide hydrochloride are suspended in 60 ml of dichloromethane and 4.6 ml (33 mmol) of triethylamine are added thereto. To the obtained mixture, 1.27 ml (16 mmol) of chloroacetyl chloride dissolved in 15 ml of dichloromethane are added dropwise below −10° C. The reaction mixture is stirred for an hour and the suspension is poured into 500 ml of ethylacetate, the precipitated triethylamine hydrochloride is filtered off, the filtrate is concentrated and purified by chromatography using a chloroform-methanol 4:1 mixture.
- Thus 3.0 g (97%) of title compound are obtained as a colourless oil which crystallizes during standing. Its melting point is 95-96° C.
- 1H-NMR (400 MHz, DMSO-d6): δ 2.22-2.50 (m, 2H, 3-CH2), 3.57-4.04 (m, 2H, 5-CH2), 4.36 (qv, 2H, CH2Cl), 5.22 (d, 0.5H) and 5.39 (d, 0.5H) (4-CH), 7.03 (s, 0.74H) and 7.22 (s, 1H) and 7.56 (s, 0.26H) (NH2).
- f.) (2S,4S)-1-(2-chloroacetyl)-4-fluoro-2-pyrrolidinecarbonitrile
- In the general formula (III) R2 means hydrogen atom and R3 means fluorine atom.
- 1.73 g (46 mmol) of (2S,4S)-1-(2-chloroacetyl)-4-fluoro-2-pyrrolidinecarboxamide are dissolved in a mixture of 20 ml of dry acetonitrile and 30 ml of dry dichloromethane and 32 ml (25 mmol) of phosphorous oxychloride are added thereto. The mixture is refluxed for 24 hours. The solution is poured into another flask and 50 g of potassium carbonate are added and the mixture is stirred for an hour. Solid salts are filtered off and after evaporation of the filtrate a pale yellow oil is obtained which is purified by chromatography using a 9:1 mixture of chloroform and methanol. The pure above product is 0.6 g (43%) white crystalline solid. M.p.: 134-136° C.
- 1H-NMR (400 MHz, CDCl3): δ 2.23-2.62 (m, 2H, 3-CH2), 3.59-4.06 (m, 2H, 5-CH2), 4.46 (qv, 2H, CH2Cl), 4.99 (m, 1H, 2-CH), 5.36 (m, 0.5H) and 5.64 (m, 0.5H)(4-H).
- g.) (2S,4S)-4-fluoro-1-(2-{[8-(2-pyrazinyl)-8-azabicyclo[3.2.1]octan-3-yl]exoamino}acetyl-2-pyrrolidinecarbonitrile dihydrochloride
- of general formula (I) wherein R1 means 2-pyrazinyl group, B means a group of formula (4), R2 stands for hydrogen atom and R3 stands for fluorine atom.
- 243 mg (1.2 mmol) of 8-(2-pyrazinyl)-8-azabicyclo[3.2.1]oct-3-yl-exo-amine reacted with 191 mg (1 mmol) of (2S,4S)-1-(2-chloroacetyl)-4-fluoro-2-pyrrolidine carbonitrile as it is described in Example 1/g.). The product is purified by chromatography using a 4:1 mixture of chloroform and methanol and its dihydrochloride is prepared. Thus 125 mg (29%) of title compound are obtained in the form of white crystals. M.p.: 201-202° C. 1H-NMR (400 MHz, DMSO-d6): δ 1.76-1.80 (m, 4H), 1.94-2.01 (m, 4H), 2.47-2.51 (m, 2H), 3.64-3.80 (m, 1H), 3.79-4.03 (m, 2H), 4.15 (m, 1H), 4.67 (m, 2H), 5.03 (m, 1H), 5.52 (d, 1H), 7.86 (s, 1H), 8.15 (dd, 1H), 8.28 (d, 2H), 8.90 and 9.00 (s, 2H).
- The meaning of R1 is 2-pyrazinyl group, B means a group of formula (I), R2 and R3 mean fluorine atom in general formula (I).
- a.) 1-(2-Pyraziny-1)-4-acetamino-piperidine with (V) general formula—where R1 is 2-pyrazinyl, Y is COCH3, B is (1) group
- 0.45 ml of chloropyrazine (5 mmol) and 1.6 g of 4-acetaminopyperidine (10 mmol) are dissolved in 15 ml of 1-pentanol and heated under reflux for 14 hours. The solvent are evaporated and the residue is purified by column chromatography using ethyl acetate—methanol—25% aqueous NH3 solution (17:3:1) as eluent to result 0.81 g (76%) of the above crystalline product. M.p.: 158-160° C. 1H-NMR (200 MHz, DMSO-d6): δ 1.34 (dq, 2H), 1.78 (m, 5H), 3.03 (dt, 2H), 3.74-3.89 (m, 1H), 4.21 (td, 2H), 7.77 (d, 1H, 3′-H), 7.80 (s, 1H, NH), 8.05 (dd, 1H, 5′-H), 8.31 (d, 1H, 6′-H).
- b.) 1-(2-Pyrazinyl)-4-amino-piperidine with (II) general formula—where R1 and B are given in step 3a.).
- 697 mg of 1-(2-Pyrazinyl)-4-acetamino-piperidine (3.2 mmol) are dissolved in 15 ml of 2 N hydrochloric acid and the solution is heated under reflux for 8 hours. After cooling the mixture is treated with 20% sodium hydroxide and the aqueous solution washed with 4×20 ml dichloromethane. The combined organic layers are dried over Na2SO4 and evaporated to afford 292 mg (52%) of the above product as yellow crystals.
- M.p.: 113-115° C.
- 1H-NMR (200 MHz, DMSO-d6-CDCl3): δ 1.09-1.36 (m, 2H), 1.78 (d, 2H), 2.78-3.31 (m, 4H), 3.54 (m, 1H), 7.76 (d, 1H, 3′-H), 8.03 (dd, 1H, 5′-H), 8.29 (d, 1H, 6′-H).
- c.) (2S)-4,4-Difluoro-1-(2-{[1-(2-pyrazinyl)piperidin-4-yl]amino}acetyl)-2-pyrrolidinecarbonitrile dihydrochloride of general formula (I) wherein R1 is 2-pyrazinyl group, B means a group of formula (I), R2 and R3 mean fluorine atom
- 63 mg of 1-(2-pyrazinyl)-4-amino-piperidine (0.32 mmol) and 62 mg (2S)-1-(2-chloroacetyl)-4,4-difluoro-2-pyrrolidine carbonitrile (0.32 mmol) and 285 mg of polymer-bound 2-tert-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2-diazaphosphorine (PBEMP) (0.73 mmol) are dissolved in 20 ml dry acetonitrile and stirred at 55° C. for 8 hours. The resin is removed by filtration, the filtrate is concentrated by vacuum and the residue is purified by column chromatography using chloroform—methanol (9:1) as eluent to result an oil, which is treated with hydrochloric acid in diethylether result in 83 mg (60%) of title compound, as white crystals. M.p.: 158-160° C. 1H-NMR (400 MHz, DMSO-d6): δ1.54 (m, 2H), 2.15 (m, 2H), 2.80-2.95 (m, 4H), 4.20-4.25 (m, 4H), 4.55 (d, 2H,), 5.20 (t, 1H), 7.00 (d, 1H), 7.87 (dd, 1H), 8.50 (d, 1H); 9.38 (br, 2H).
- The meaning of R1 is 5-cyano-pyridin-2-yl group, B means a group of formula (I), R2 and R3 mean fluorine atom in general formula (I).
- a.) 1-(5-Cyanopyridin-2-yl)-4-acetamino-piperidine with (V) general formula—where R1 is 5-cyanopyridin-2-yl, Y is COCH3, B is (1) group
- Following procedures outlined for examples 3a), the above crystalline product is isolated. Melting point is 246-251° C. 1H-NMR (200 MHz, DMSO-d6): δ 1.19-1.39 (m, 2H), 1.82 (m, 5H), 3.04-3.18 (m, 2H), 3.85 (m, 1H), 4.29 (dd, 2H), 6.94 (d, 1H), 7.82 (dd, 1H), 8.46 (d, 1H).
- b.) 1-(5-Cyanopyridin-2-yl)-4-amino-piperidine with (II) general formula—where R1 and B are given in step 4a.).
- Following procedures. outlined for examples 3b), the above crystalline product is isolated. M.p.: 65-68° C. 1H-NMR (200 MHz, CDCl3-DMSO-d6): δ 1.16-1.38 (m, 2H), 1.83-1.92 (m, 2H), 2.89-3.06 (m, 2H), 4.26 (dd, 2H), 6.54 (d, 1H), 7.50 (dd, 1H), 8.29 (d, 1H).
- c.) (2S)-4,4-Difluoro-1-(2-{[1-(5-cyanopyridin-2-yl)piperidin-4-yl]amino}acetyl)-2-pyrrolidinecarbonitrile dihydrochloride
- Following procedures outlined for examples 3c), the above crystalline product is isolated. M.p.: 146-147° C. 1H-NMR (DMSO-d6): δ 1.56 (m, 2H), 2.15 (d, 2H), 2.92 (m, 4H), 4.20 (m, 4H), 4.55 (d, 2H), 5.20 (t, 2H), 7.01 (d, 1H), 7.88 (d, 1H), 8.49 (dd, 1H), 9.38 (d, 2H).
- Following procedures, outlined for Examples 1-2, the compounds listed in the Table 1 were prepared as a free base or as a salt.
-
TABLE 1 (I) B Melting point, composition, Example R1 (Formula) R2 R3 physical appearance 5. (4) F F 133-141° C., dihydrochloride, off-white crystals 6. (4) F F 238-240° C., dihydrochloride, yellow crystals 7. (4) F F 237-239° C., dihydrochloride white crystals 8. (4) F F 160-162° C., yellow crystals 9. (4) F F 119-121° C., dihydrochloride, white crystals 10. (4) F F 221-225° C., trihydrochloride, white crystals 11. (4) F F 200-201° C., dihydrochloride, white crystals 12. (4) F F 185-189° C., dihydrochloride, white crystals 13. (4) F F 108-110° C., white crystals 14. (4) F F >340° C., dihydrochloride, off-white crystals 15. (4) F F 300-305° C., dihydrochloride white crystals 16. (4) F F 185-186° C., dihydrochloride, yellow crystals 17. (4) F F 293-296° C., dihydrochloride, white crystals 18. (4) F F 148-167° C., dihydrochloride, white solid 19. (4) F F >350° C., 1.5 HCl, white crystals 20. (4) F F 240-243° C., dihydrochloride, white crystals 21. (4) F F 102-104° C., white crystals 22. (4) F F 236-241° C., trihydrochloride, white crystals 23. (4) F F 201-202° C., dihydrochloride, white crystals 24. (4) F F 256-259° C., dihydrochloride, white crystals 25. (4) F F 119-120° C., yellow crystals 26. (4) F F 114-117° C., white solid 27. (4) F F 94-97° C., white solid 28. (2) F F 66-70° C., white foam 29. (3) F F 216-218° C., dihydrochloride, white crystals 30. (5) F F 182-185° C., white solid 31. (5) F F 241-243° C., trihydrochloride, yellow crystals 32. (6) F F 276-278° C., dihydrochloride, yellow crystals 33. (6) F F 240-243° C., dihydrochloride, yellow crystals 34. (6) F F 82-85° C., hydrochloride, off-white crystals 35. (7) F F 141-144° C., white crystals 36. (7) F F 281-284° C., dihydrochloride, yellow crystals 37. (7) F F 271-272° C., dihydrochloride, off-white crystals - Following procedures, outlined for Examples 3-4, the compounds listed in the Table 2 were prepared as a free base or as a salt.
-
TABLE 2 (I) B Melting point, composition, Example R1 (Formula) R2 R3 physical appearance 38. (1) F F 219-228° C., dihydrochloride, white crystals 39. (1) F F 198-200° C., dihydrochloride, white crystals 40. (1) F F 224-229° C., trihydrochloride, off white crystals 41. (1) H F 157-158° C., pale yellow crystals 42. (1) F F 2.5 HCl, amorphous white solid 43. (1) F F 292-295° C., dihydrochloride, white crystals 44. (1) F F 210-212° C., dihydrochloride, white crystals 45. (1) F F 284-288° C., dihydrochloride, white crystals 46. (1) F F 282-285° C., dihydrochloride, off white crystals 47. (1) F F 170-173° C., dihydrochloride, yellow crystals 48. (1) H F 122-124° C., white crystals 49. (1) F F 102-105° C., dihydrochloride, white crystals 50. (1) F F 63-65° C., white crystals 51. (1) F F >350° C., dihydrochloride, white crystals 52. (1) F F 168-171° C., dihydrochloride, white crystals 53. (1) F F 173-175° C., dihydrochloride, yellow crystals 54. (1) F F 162-163° C., dihydrochloride, white crystals 55. (1) F F Dihydrochloride, amorphous off-white solid 56. (1) F F 51-53° C., light yellow foam 57. (1) F F 228-230° C., dihydrochloride, white crystals 58. (1) F F 281-284° C., dihydrochloride, yellow crystals 59. (1) F F 116-120° C., dihydrochloride, yellow crystals 60. (1) F F 178-185° C., salt formed with 2.5 molecules of HCl, white crystals 61. (1) F F Dihydrochloride, amorphous off-white solid 62. (1) F F 226-235° C., dihydrochloride, white crystals 63. (1) F F 278-283° C., dihydrochloride, off-white crystals 64. (1) F F 2.5 HCl, amorphous yellow solid 65. (1) F F 318-320° C., dihydrochloride, white crystals 66. (1) F F 157-160° C., white crystals - Following procedures, outlined for Examples 1-4, the compounds of the general formula (I) listed in the Table 3 were prepared as a free base or as a salt.
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TABLE 3 (I) B Melting point, composition, Example R1 (Formula) R2 R3 physical appearance 67. (1) F F 216-228° C., trihydrochloride, off white crystals 68. (1) F F 163-167° C., cream-coloured solid 69. (1) F F dihydrochloride, amorphous off-white solid 70. (1) F F 275-277° C., dihydrochloride, white solid 71. (4) F F 148-152° C., dihydrochloride, pale yellow crystals 72. (7) F F 229-231° C., trihydrochloride, white crystals - Following procedures outlined for Examples 1a) and 2a) the intermediate compounds of the general formula (V) listed in the Table 4 were prepared.
-
TABLE 4 (V) Characterisation (M.p., LC/MS or Example R1 aromatic protons by 1H-NMR [DMSO-d6] 4.1. 6.93 (m, 1H), 7.35 (m, 1H), 7.98 (m, 1H), 8.04 (d, 1H) 4.2. 141-143° C. 4.3. 212-215° C. 4.4. 6.58 (d, 1H), 6.65 (d, 1H), 7.51 (t, 1H) 4.5. 2.37 (s, 3H), 6.75 (1H, d), 7.15 (1H, dd), 7.81 (1H, d) 4.6. 6.75 (d, 1H), 7.60 (d, 1H), 8.12 (s, 1H) 4.7. 6.65 (d, 1H), 7.84 (d, 1H) 4.8. 227-230° C. 4.9. 7.30 (d, 1H), 7.51 (d, 1H) 4.10. 6.71 (d, 1H), 8.31 (d, 1H) 4.11. 161-162° C. 4.12. 6.72 (d, 1H), 8.04 (d, 1H) 4.13. 187-188° C. 4.14. [MH]+ = 330 4.15. 172-174° C. 4.16. 6.80 (d, 1H), 7.19 (d, 1H) 4.17. 6.87 (d, 1H), 7.20 (td, 1H), 7.61 (m, 1H), 7.57 (m, 2H), 7.86 (d, 1H) 4.18. 7.38 (td, 1H), 7.57 (td, 1H), 7.74 (dd, 1H), 7.88 (dd, 1H), 8.45 (s, 1H) 4.19. 7.16 (t, 1H), 7.35 (t, 1H), 7.53 (d, 1H), 7.86 (d, 1H) 4.20. 163-165° C. 4.21. 166-169° C. 4.22. 153-156° C. 4.23. 7.51 (m, 5H) - Following procedures outlined for Examples 1a) and 2a) the intermediate compounds of the general formula (V) listed in the Table 5 were prepared.
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TABLE 5 (V) B Characterisation (M.p. or aromatic protons Example R1 (Formula) by 1H-NMR [DMSO-d6] 5.1. (2) 154-156° C. 5.2. (5) 134-135° C. 5.3. (5) 159-161° C. 5.4. (6) 7.82 (d, 1H), 8.11 (d, 1H), 8.35 (s, 1H) 5.5. (6) 6.93 (d, 1H), 7.91 (d, 1H), 8.54 (s, 1H) 5.6. (6) 6.99 (t, 1H), 7.13 (t, 1H), 7.26 (d, 1H), 7.36 (d, 1H) 5.7. (7) 6.50 (t, 1H), 8.33 (m, 2H) 5.8. (7) 6.90 (d, 1H), 7.80 (d, 1H), 8.44 (s, 1H) 5.9. (7) 6.98 (t, 1H), 7.12 (t, 1H), 7.29 (d, 1H), 7.39 (d, 1H) 5.10. (7) 176-176° C. - Following procedures outlined for Examples 3a) and -4a) the intermediate compounds of the general formula (V) listed in the Table 6. were prepared (Y=Ac(acetyl) or Boc=tert butyloxy-carbonyl).
-
(V) Characterisation (M.p., LC/MS or Example R1 Y aromatic protons by 1H-NMR [DMSO-d6]) 6.1. Ac 6.60 (dd, 1H), 6.67 (d, 1H), 7.48 (td, 1H), 8.17 (dd, 1H) 6.2. Boc 127-129° C. 6.3. Boc 138-140° C. 6.4. Ac 2.12 (s, 3H), 6.74 (d, 1H), 7.33 (dd, 1H), 7.76 (d, 1H) 6.5. Ac 166-164° C. 6.6. Boc 6.58 (d, 1H), 6.65 (d, 1H), 7.51 (t, 1H) 6.7. Ac 6.65 (d, 1H), 7.45 (dd, 1H), 8.10 (d, 1H) 6.8. Ac 6.72 (d, 1H), 7.60 (d, 1H), 8.13 (s, 1H) 6.9. Ac 223-226° C. 6.10. Boc 139-140° C. 6.11. Ac 126-128° C. 6.12. Boc 6.95 (d, 1H), 7.22 (d, 1H) 6.13. Boc 169-171° C. 6.14. Boc 144-146° C. 6.15. Boc 172-174° C. 6.16. Boc 149-152° C. 6.17. Boc [MH]+ = 304 6.18. Ac 196-200° C. 6.19. Ac 6.80 (d, 1H), 7.12 (d, 1H) 6.20. Ac 234-236° C. 6.21. Ac 163-166° C. 6.22. Boc 7.59 (m, 3H), 8.10 (m, 1H), 8.29 (d, 1H) 6.23. Boc 129-133° C. 6.24. Boc 7.49 (d, 1H), 7.72 (td, 1H), 7.85 (td, 1H), 7.90 (t, 1H), 7.98 (d, 1H), 8.13 (d, 1H) 6.25. Boc 7.38 (td, 1H), 7.57 (td, 1H), 7.74 (dd, 1H), 7.88 (dd, 1H), 8.45 (s, 1H) 6.26. Ac 7.01 (t, 1H), 7.27 (t, 1H), 7.42 (d, 1H), 7.73 (d, 1H) 6.27. Boc 165-166° C. 6.28. Boc 206-211° C. 6.29. Boc 7.5 (m, 5H) 6.30. Boc 159-160° C. - Following procedures outlined for Examples 1b) and 2b) the intermediate compounds of the general formula (II) listed in the Table 7. were prepared.
-
TABLE 7 (II) Characterisation (M.p. or aromatic protons Example R1 by 1H-NMR [DMSO-d6]) 7.1. 6.96 (m, 1H), 7.34 (m, 1H), 8.02 (m, 1H), 8.08 (d, 1H) 7.2. 123-125° C. 7.3. 175-178° C. 7.4. 6.55 (d, 1H), 6.63 (d, 1H), 7.49 (t, 1H) 7.5. 2.40 (s, 3H), 6.82 (dd, 1H,), 7.20 (d, 1H), 7.89 (d, 1H) 7.6. 6.40 (d, 1H), 7.60 (d, 1H), 8.14 (s, 1H) 7.7. 2.35 (s, 3H), 6.62 (d, 1H), 7.81 (d, 1H) 7.8. 120-123° C. 7.9 7.32 (d, 1H), 7.58 (d, 1H), 7.10. 6.68 (d, 1H), 8.29 (d, 1H) 7.11. 7.77 (s, 1H), 8.13 (s, 1H) 7.12. 6.69 (d, 1H), 8.02 (d, 1H) 7.13. 194-198° C. 7.14. 115-117° C. 7.15. 2.40 (s, 3H), 6.40 (d, 1H), 7.87 (d, 1H) 7.16. 6.79 (d, 1H), 7.12 (d, 1H) 7.17 6.86 (d, 1H), 7.19 (td, 1H), 7.52 (m, 2H), 7.69 (dd, 1H), 7.84 (d, 1H) 7.18 7.35 (m, 1H), 7.58 (m, 1H,), 7.80 (dd, 1H), 8.66 (s, 1H) 7.19 126-127° C. 7.20. 127-129° C. 7.21. 90-93° C. 7.22 107-107° C. 7.23. 227-228° C. as dihydrochloride - Following procedures outlined for Examples 1b) and 2b) the intermediate compounds of the general formula (II) listed in the Table 8 were prepared.
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TABLE 8 (II) R1—B—NH2 B Characterisation (M.p. or aromatic protons Example R1 (Formula) by 1H-NMR [DMSO-d6]) 8.1. (2) 6.49 (d, 1H), 7.76 (dd, 1H), 8.43 (d, 1H) 8.2. (5) 85-89° C. 8.3. (5) 7.74 (d, 1H), 8.04 (d, 1H), 8.15 (s, 1H) 8.4. (6) 7.80 (d, 1H), 8.12 (d, 1H), 8.37 (s, 1H) 8.5. (6) 6.95 (d, 1H), 7.89 (d, 1H), 8.51 (s, 1H) 8.6. (6) 7.00 (t, 1H), 7.14 (t, 1H), 7.26 (d, 1H), 7.37 (d, 1H) 8.7. (7) 6.50 (t, 1H), 8.29 (d, 1H), 8.31 (d, 1H) 8.8. (7) 6.90 (d, 1H), 7.80 (d, 1H), 8.47 (s, 1H) 8.9. (7) 6.95 (t, 1H), 7.14 (t, 1H), 7.26 (d, 1H), 7.37 (d, 1H) 8.10. (7) 3.83 (s, 2H), 7.21-7.40 (,m, 5H) - Following procedures outlined for Examples 3b) and 4b) the intermediate compounds of the general formula (II) listed in the Table 9. were prepared.
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9 TABLE (II) Characterisation (M.p., LC/MS or Example R1 aromatic protons by 1H-NMR [DMSO-d6]) 9.1. 6.55 (dd, 1H), 6.79 (d, 1H,), 7.48 (td, 1H), 8.07 (dd, 1H) 9.2. 104-106° C. 9.3. 234-236° C. as dihydrochloride 9.4. 2.12 (s, 3H), 6.72 (d, 1H), 7.33 (dd, 1H), 7.92 (d, 1H) 9.5. 2.26 (s, 3H), 6.47 (m, 2H), 8.03 (d, 1H) 9.6. 238-240° C. as dihydrochloride 9.7. 6.84 (d, 1H), 7.52 (dd, 1H), 8.05 (d, 1H) 9.8. 6.75 (d, 1H), 7.60 (d, 1H), 8.12 (s, 1H) 9.9. 86-89° C. 9.10. 2.37 (s, 3H), 6.72 (d, 1H), 7.87 (d, 1H) 9.11. 117-119° C. 9.12. 135-139° C. 9.13. 6.65 (d, 1H), 8.27 (d, 1H) 9.14. 7.78 (s, 1H), 8.26 (s, 1H) 9.15. 6.80 (d, 1H), 8.00 (d, 1H) 9.16. 296-303° C. as dihydrochloride 9.17. [MH]+ = 204 9.18. 2.33 (s, 3H), 6.51 (d, 1H), 7.96 (d, 1H) 9.19. 112-114° C. 9.20. 167-170° C. 9.21. 67-68° C. 9.22. 7.60 (m, 2H), 7.72 (d, 1H), 8.15 (m, 1H), 8.32 (1H, d), 9.23. 260-262° C. as dihydrochloride 9.24. 253-256° C. as dihydrochloride 9.25. 7.34 (m, 1H), 7.58 (m, 2H), 7.79 (dd, 1H), 8.81 (s, 1H) 9.26. 7.03 (t, 1H), 7.26 (t, 1H), 7.42 (d, 1H), 7.74 (d, 1H) 9.27. 274-275° C. as dihydrochloride 9.28. 113-115° C. 9.29. 216-223° C. as dihydrochloride 9.30. 3.70 (s, 6H)
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- 2004-10-04 HR HR20040910A patent/HRP20040910A2/en not_active Application Discontinuation
- 2004-10-05 NO NO20044221A patent/NO20044221L/en not_active Application Discontinuation
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2006
- 2006-09-07 IL IL177933A patent/IL177933A0/en unknown
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2008
- 2008-03-05 US US12/042,595 patent/US7655663B2/en not_active Expired - Fee Related
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2010
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Patent Citations (2)
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US20040242636A1 (en) * | 2001-06-27 | 2004-12-02 | Haffner Curt Dale | Fluoropyrrolidines as dipeptidyl peptidase inhibitors |
US20050176771A1 (en) * | 2002-07-23 | 2005-08-11 | Masahiko Hayakawa | 2-Cyano-4-fluoropyrrolidine derivative or its salt |
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